What Does It Take To Start Using Zend Expressive?
Ever thought that it’s hard to get started with Zend Expressive? Ever think you need to know Vagrant, Ansible, Docker, Puppet, Linux, and more? Nope, you don’t! In this post, I’m going to show you that, while these tools can help, if you’re just getting started with the framework (such as learning about it), you don’t need them.
I want to be clear, before we go any further, that I’m not talking about doing fully-fledged development. Regardless of the language or language framework that you use, if you’re building an application that renders anything more than something quite elementary, it’s going to require more than a little bit of effort.
So what I’m talking about here is when you’re just starting and getting a feel for Zend Expressive, right up to building a test application. I’m not talking about a fully-fledged, deployed application that requires extensive tests, one backed by a CI/CD pipeline.
With that said, let’s continue!
Much has been said about Zend Framework over the years. It’s been derided as over-engineered, overly complicated, and bloated. If there were one term that I’d heard associated with it more than any other, it would be “enterprisey”.
While I think that may well have been a deliberate choice on Zend’s part (perhaps because it aligned with their corporate goals) the framework wasn’t as hard as many people made out. Nor was it as bad as some have bemoaned. I think some people revelled in denigrating it — I know one or two personally.
Sure, it wasn’t the easiest of frameworks to get started with — especially version 1. , are historical reasons for that, such as it being built before PHP’s Composer-inspired renaissance. If you were around back then, you might remember that Symfony 1 was built similarly. It was a fact of life living in a world where Composer was yet to exist.
That said, with each subsequent release, Zend Framework’s become easier to start with — even if you’ve never used the framework before.
Now Zend Expressive, the third iteration of the framework, takes that ease of use to a whole new level. So today, I’m going to show you just how easy it is to get started; but first, let’s ask two questions.
Won’t I Need Docker?
While Docker’s a fantastic tool, whether you want to rapidly build a development environment, or to go from idea through to deployment, if you’re just getting started with Zend Expressive, you don’t need Docker!
Yes, it makes your life easier, and it’s a tooling solution that I strongly recommend, especially over custom virtual machines.
If you’re just getting started with Zend Expressive, just experimenting with it or testing it out, Docker’s likely going to be overkill. It comes in handy later, however.
Won’t I Need Vagrant, VirtualBox, VMWare, Ansible, Puppet, and Friends?
All of these tools are fantastic! They’re tools which have been developed over many years and make it far more uncomplicated than ever to provision a virtual environment; one that’s:
- Configured just to your needs.
- Can mirror in production, staging, and testing, your development environment.
Also, let’s not forget just how much time they can save new developers when they’re getting started. Whether they’re new to a company, a team, or a codebase, these tools can provide you with a ready-to-use development environment. By doing so, the developer need only focus on learning the code, not on creating an environment fit for purpose.
However, if you’re just getting started and learning Zend Expressive’s foundations, you don’t need them either. They’ll come into their own later though, once you’ve gotten settled and have a specific application in mind that you want to build.
However, in the beginning, they’re just overkill.
So What Do I Need Then?
You might think that I’ve indulged in a classic bait-and-switch when I give you the answer. However, I promise you that I’ve not. The answer is genuine.
All you need is to have PHP installed, at least version 5.6 — but I strongly recommend version 7. After that, you need to run two commands, and you’re up and running, ready to experiment and learn.
What are those commands? The first one is Composer’s create-project command: Here’s an example, where we’ll create a new project based on the Zend Expressive Skeleton.
composer create-project -s rc zendframework/zend-expressive-skeleton <your project name>
This command launches the Zend Expressive Skeleton Installer and guides you through a series of questions to create a template directory structure, one ready to boot.
After that, you need the second command one of the many Composer scripts that come with the composer.json file, in the project which the previous command generated. It launches PHP’s built-in web server. If you’ve not used it before, the built-in web server is:
designed to aid application development. It may also be useful for testing purposes or for application demonstrations that in controlled environments. It is not intended to be a full-featured web server. It should not be used on a public network.
The following command starts it and boots your new Zend Expressive project, listening on port 8080 on
./public as the web server’s directory root.
After you’ve done that, you’ll see the default page, which you can see an example of below, and you’re ready to begin delving through the sample project’s code, structure, and configuration.
But there are other commands!
That’s right, in addition to the two commands that we’ve just stepped through, there are several others. They’re worth going through, as they make your life developing Zend Expressive applications that much easier.
These commands, as their names imply, enable and disable development mode, and show its status. If you’re not familiar with Zend Expressive’s development mode, it’s provided by the integrated zfcampus/zf-development-mode package.
To quote the package’s README:
This package provides a script to allow you to enable and disable development mode for zend-mvc (both versions 2 and 3) and Expressive applications. The script allows you to specify configuration and modules that should only be enabled when in development, and not when in production.
An example feature that’s not enabled during development mode is the configuration cache. Logically, during development, you’re likely to be continuously making changes and need to see the effects of those changes as soon as they occur. If the changes were cached, it would likely cause much confusion. As a result, it’s disabled during development.
Linked in with the last command is
As the name implies, it clears any existing configuration cache, which by default is stored in
cs-check and cs-fix
PHP Code Beautifier and Fixer:
PHP_CodeSniffer is able to fix many errors and warnings automatically. The diff report can be used to generate a diff that can be applied using the patch command. Alternatively, the PHP Code Beautifier and Fixer (phpcbf) can be used in place of phpcs to automatically generate and apply the diff for you.
test, test-coverage, and upload-coverage
These three commands run the application’s tests without and with code coverage enabled, and upload the coverage report information.
They’re a handy set of commands, and I strongly encourage you to try them out, if you’ve not already done so.
And that’s all you need to get up and running with Zend Expressive.
Sure, the project that the
create-project command generates is quite minimal, and doesn’t make use of the multitude of available PHP extensions; such as Memcache, Redis, ElasticSearch, and so on.
However, if you want to get up and running if you want to see how an expressive project is composed, you need very little. I hope that this post goes some way to giving you a fresh perspective on Zend Expressive and the greater Zend Framework set of packages.
If you’s like help getting started, with Zend Expressive, check out the official docs, this talk from Chris Tankersley, and the essentials book. There are loads more resources, but I recommend these three as excellent places to start.
You might also be interested in...
- How to Create a Zend Expressive Module
- How to Migrate from Zend Expressive Version 1 to 2 with Command-Line Tooling Support
- Create Modules and Middleware with Command-Line Tooling Support
- Announcing the new Zend Expressive Essentials Book & Course
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